Question

If $a_n=1-5n$, what is $a_{10}$ ?

Short answer

The value of$a_{10}=-49$ .

Step-by-step solution

Step 1. Given Information.

Given arithmetic sequence is described by $a_n=1-5n$

Step 2. Calculation.

Plugging the values in the equation:

$\begin{array}{l}{a}_n=1-5n\\ a_{10}=1-5\left(10\right)\\ a_{10}=1-50\\ a_{10}=-49\end{array}$

Step 3. Conclusion.

Hence, $a_{10}=-49$.